Points that lie on the same straight line

Two angles whose measures sum to 90°

A polygon with at least one interior angle greater than 180°

A three-dimensional figure with a circular base and a point (apex) connected by a curved surface

Figures with exactly the same size and shape

Drawing geometric figures using only compass and straightedge

A polygon where all interior angles are less than 180°

Points or figures that lie in the same plane

A three-dimensional figure with two parallel circular bases connected by a curved surface

A unit of angle measure, equal to 1/360 of a full rotation

The length of the shortest path between two points

A polygon with all angles equal

The region outside a closed figure

The point or set of points where two figures meet

The region inside a closed figure

An undefined term; a straight path extending infinitely in both directions

A part of a line with two endpoints

Two adjacent angles whose non-common sides form a line

A point that divides a segment into two equal parts

An angle measuring greater than 90° but less than 180°

Two rays with the same endpoint extending in opposite directions

Lines or segments that intersect at right angles

An undefined term; a flat surface extending infinitely in all directions

An undefined term; a location in space with no dimension

A closed figure made up of line segments

A three-dimensional figure with two parallel congruent faces (bases) connected by parallelograms

A three-dimensional figure with a polygon base connected to a vertex by triangular faces

Part of a line with one endpoint, extending infinitely in one direction

A polygon that is both equilateral and equiangular

An angle measuring exactly 90°

A part of a line with two endpoints

A line segment that forms part of a polygon

A three-dimensional figure where all points are equidistant from the center

Two angles whose measures sum to 180°

A basic concept that cannot be defined using simpler terms

A point where two sides of a polygon meet

Nonadjacent angles formed by the intersection of two lines.

An angle whose sides are opposite rays. It measures 180°.

Geometry Terms Flashcard

Student preview

49 questions

Show all answers

1.

FLASHCARD QUESTION

Front

acute angle

Back

An angle measuring less than 90°

2.

FLASHCARD QUESTION

Front

adjacent angles

Back

Two angles that share a common vertex and side

3.

FLASHCARD QUESTION

Front

angle bisector

Back

A ray that divides an angle into two congruent angles

4.

FLASHCARD QUESTION

Front

area

Back

The measure of space inside a two-dimensional figure

5.

FLASHCARD QUESTION

Front

base

Back

The surface a three-dimensional figure rests on

6.

FLASHCARD QUESTION

Front

between

Back

A point B is between points A and C if A, B, and C are collinear and AB + BC = AC

7.

FLASHCARD QUESTION

Front

bisector angle

Back

A ray that divides an angle into two equal parts

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